[lvs-users] LVS with Tomcat application server

[John Little]

Hi all

I am testing LVS using a tomcat server (real server) to pass hl7 (medical) messages to an end application.  The setup looks like this:                                                                       
 _                                             _               _                  
|_| Medical information server -> |_| LVS ->  |_|  tomcat  ->     _
                                                      |           _                 -> |_| end user application 
                                                      | -> ->  |_|   tomcat ->                            

The load balancer is setup using direct routing.  There are mulitple port numbers in the 8000 and 9000 range running across a single VIP.  Approximately  50000 messages are currently processed with double that planned over the next year.

The question/problem:  The tomcat server must return an acknowledgement to the medical information server.  On the three ports that I am testing the ports are going into a close_wait state on the real server.  I believe it is because the acknoweldgement is either not getting to the medical information server or that it is receiving it from the real ip of the LVS router.  

Is this the correct way to set this up for what I want to accomplish so that the acknowledgment is properly returning to the medical information server?

Thank you for your help.

Regards,
John Little
Hendricks Regional Health
http://hendrickshospital.org






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